{
  inputs.nixpkgs.url = "github:nixos/nixpkgs";
  outputs = { self, nixpkgs }:
    let pkgs = nixpkgs.legacyPackages.x86_64-linux;
    in {
      devShell.x86_64-linux =
        pkgs.mkShell { buildInputs = [
                         pkgs.jdk11
                         pkgs.gradle
                         pkgs.gradle-completion
                       ]; };
   };

}